1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alex787 [66]
3 years ago
15

Neil studied how a pulley helps move an object. Neil tied a rope to an object with a mass of 10 kilograms (kg) and attached it t

o a pulley. He then pulled down on the rope. When Neil pulled down on the rope, which did he most likely learn about the force required to lift the object? Group of answer choices
1. It was half of the weight of the object.
2. It was equal to the weight of the object
3. It was two times the weight of the object.
4. It was three times the weight of the object.
Physics
1 answer:
SashulF [63]3 years ago
3 0

Answer:2

Explanation:

Given

mass of object m=10\ kg

weight of object =mg

Weight=10\times 9.8

If body is being pulled with constant velocity then the net force on body is zero i.e.

Force=weight of object

F=98\ kg

force is equal to weight of object

option 2 is correct

You might be interested in
A 1100 kg car rounds a curve of radius 68 m banked at an angle of 16 degrees. If the car is traveling at 95 km/h, will a frictio
Mariulka [41]

Answer:

Yes. Towards the center. 8210 N.

Explanation:

Let's first investigate the free-body diagram of the car. The weight of the car has two components: x-direction: towards the center of the curve and y-direction: towards the ground. Note that the ground is not perpendicular to the surface of the Earth is inclined 16 degrees.

In order to find whether the car slides off the road, we should use Newton's Second Law in the direction of x: F = ma.

The net force is equal to F = \frac{mv^2}{R} = \frac{1100\times (26.3)^2}{68} = 1.1\times 10^4~N

Note that 95 km/h is equal to 26.3 m/s.

This is the centripetal force and equal to the x-component of the applied force.

F = mg\sin(16) = 1100(9.8)\sin(16) = 2.97\times10^3

As can be seen from above, the two forces are not equal to each other. This means that a friction force is needed towards the center of the curve.

The amount of the friction force should be 8.21\times 10^3~N

Qualitatively, on a banked curve, a car is thrown off the road if it is moving fast. However, if the road has enough friction, then the car stays on the road and move safely. Since the car intends to slide off the road, then the static friction between the tires and the road must be towards the center in order to keep the car in the road.

5 0
3 years ago
The distance from earth to teh sun usb approxximately 93 million miles. a scientist would write that number as
erastova [34]

A scientist would write that number as 1.49 x 10⁸ kilometers .

(Or, if the scientist is in France or the UK, he might write it as  1.49 x 10⁸ kilometres .)

6 0
3 years ago
If a star is 720 , 000 , 000 , 000 , 000 meters from Earth, how many seconds does it take light to travel from the Earth to the
Minchanka [31]

Answer:

anywhere between 100000 to about 400000 human years .

Explanation:

5 0
2 years ago
What is the dimensional formula of pressure ??​
Igoryamba

Answer:

pressure is equal to the net amount of force acting per unit area. Dimensional Formulae of force is M1L1T-2 and of area is L2. Therefore Pressure's dimension can be obtained by calculating Force by Area. Dimensional formula of pressure difference is M1L-1T-2.

3 0
3 years ago
Give two examples of pure substances and two examples of mixtures​
nikdorinn [45]

Answer:

1 kerosene is the pure substance, salt and water is the mixture substance

7 0
3 years ago
Read 2 more answers
Other questions:
  • What part of the water is affected by a wave in deep water
    13·1 answer
  • Which is larger, 65mph or 120kph? As a percentage, how much faster is one than the other?
    5·2 answers
  • A tennis ball with a speed of 11.3 m/s is moving perpendicular to a wall. after striking the wall, the ball rebounds in the oppo
    11·1 answer
  • (b) Suppose oil spills from a ruptured tanker and spreads in a circular pattern. If the radius of the oil spill increases at a c
    12·2 answers
  • Can anyone help me with this? <br>the question : find the value of the resistors​
    10·1 answer
  • Can someone help me please
    7·1 answer
  • What is the mechanical advantage of the lever shown below?
    15·1 answer
  • The definition of Force
    13·2 answers
  • Number 29 plz help physics
    15·1 answer
  • 1. A Passenger car (m= 10.0 kg) and a flat car (m= 7.5 kg) collide and move off as
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!